A stone with mass $0.30\,\text{kg}$ is projected straight downward at a speed of $20\,\text{m s}^{-1}$ from a point $12\,\text{m}$ above the ground. It moves vertically until it reaches the ground. Air resistance may be ignored. What is the kinetic energy of the stone immediately before it hits the ground?
- A$25\,\text{J}$
- B$35\,\text{J}$
- C$60\,\text{J}$
- D$95\,\text{J}$